EN | Operating manual Start-up
32 WVM 45 -1450
Preparation for commissioning
For the commissioning of the dryer, follow the instructions as set out below.
Pressurisation of unit
Check the stop valves at the vessel pressure gauges to ensure that they are opened (see
page 13).
Check the valves at the inlet and outlet for the compressed air (provided by operator) and
ensure that they are closed (see also example of installation on page 28).
Ensure that the compressed air system in front of the dryer is pressurised. Adjust pres-
sure, if necessary. Switch on compressor.
Slowly open compressed air inlet valve!
Avoid abrupt pressure increase! Rapid pressurisation may lead to serious da-
mage to the dryer! Therefore, open compressed air inlet valve slowly and with
caution!
Slowly open compressed air inlet valve
leading to the dryer.
Monitor the pressure increase at the vessel
pressure gauge (see page 13): In one of the
vessels, the pressure must be increased until it
reaches the operating pressure.
Compressed air inlet to the dryer
Avoid abrupt pressure drop!
Avoid abrupt pressure drops by all means! Too fast a pressure drop or too high
fl ow rates can cause damage to the dryer. For this reason, make sure to open
the pressure outlet valve only slowly or implement a start device in the com-
pressed air network immediately downstream of the dryer!
Slowly open compressed air outlet valve. Monitor the pressure in the pressurised vessel
at the vessel pressure gauge (see page 13). The vessel pressure should not drop by more
than 25 % and must never drop below the minimum pressure of the installed valves (approx.
5 bar).
Note:
You may only switch on the dryer when the pressure gauge at the pressurised
vessel indicates the required minimum pressure for the installed valves (see
above).
The unit is now fully pressurised. Proceed by checking the direction of rotation of the vacuum
pump.
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